Are you looking for one because you want to ride on piccolo? they have them for rent at $5/day.

If you are looking for an old track frame to buy, good luck. Track bikes are at their highest rate of production in history, yet your lbs probably stocks no more than 3 different ones. Everyone dreams of going to a yard sale and finding a derosa track bike with dust on it for $20, but honestly, they've already been discovered.

All that said, the drome is relatively new (mid 90's or so?), so the chances of finding an old bike is unlikely.